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SSC CGL 2025 PYQ — Question 84

SSC CGL Tier II - 20 January 2025 - Shift I • English • Q84

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Read the given passage and answer the questions that follow.

The extraction of indigo dye involves harvesting the small, green leaves of the Indigofera plant before its flowers bloom. These leaves undergo a process of soaking in water and churning until a navy blue froth is released. The upper portion of the resulting mixture is drained for irrigation, while the leaves are repurposed as fertilizer. After allowing the water and fine sediment to settle for a day, the liquid is separated from the sediment. The obtained deep blue paste is then subjected to filtration to remove dirt and impurities, followed by compression into cakes and drying for several days. Once dried, the indigo is ready for use as a dye. Lime (Ca(OH)₂) can be added to the initial water and leaves mixture, and various natural sugars can be dissolved into the paste to enhance the extraction process.

In the extraction process described, what is the purpose of allowing the water and fine sediment at the bottom of the tank to settle for a day?

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Correct answer: A

Explanation

The correct answer is option 1 i.e. To facilitate the separation of liquid from sediment.

'To facilitate the separation of liquid from sediment' is the correct answer because the purpose of allowing the water and fine sediment to settle is to help the liquid and solid parts of the mixture separate. By letting the mixture sit for a day, the heavier particles (sediment) sink to the bottom, while the liquid portion can be easily separated from the sediment. This process makes it easier to extract the clean liquid needed for further steps in the indigo dye extraction process.